/Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/BaseTools/BaseMeshProcessingTool.h
calculated base normals. This pointer does not change for the lifetime of the Tool.
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FMeshBoundaryLoops](API\Runtime\GeometryCore\FMeshBoundaryLoops) > & GetInitialBoundaryLoops()